Rainbow-electronics MAX1181 Manual do Utilizador descarregar pdf (Página 3)

MAX1181

Dual 10-Bit, 80Msps, +3V, Low-Power ADC with

Internal Reference and Parallel Outputs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +3V, OV

= +2.5V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through

a 10kΩ resistor, V

= 2V

p-p

(differential w.r.t. COM), C

= 10pF at digital outputs (Note 5), f

CLK

= 83.333MHz (50% duty cycle), T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Intermodulation Distortion

(first five odd-order IMDs)

IMD

INA or B

= 38.1546MHz at -6.5dB FS

INA or B

= 41.9532MHz at -6.5dB FS

(Note 2)

-73.5 dBc

INA or B

= 7.47MHz, T

= +25°C

-73 -64

INA or B

= 20MHz, T

= +25°C -70 -63

Total Harmonic Distortion

(first five harmonics)

THD

INA or B

= 39.9MHz (Note 1) -70

dBc

Small-Signal Bandwidth Input at -20dB FS, differential inputs 500 MHz

Full-Power Bandwidth FPBW Input at -0.5dB FS, differential inputs 400 MHz

Aperture Delay t

1ns

Aperture Jitter t

2ps

RMS

Overdrive Recovery Time For 1.5 x full-scale input 2 ns

Differential Gain ±1%

Differential Phase ±0.25 degrees

Output Noise INA+ = INA- = INB+ = INB- = COM 0.2 LSB

RMS

INTERNAL REFERENCE

Reference Output Voltage REFOUT

2.048

±3%

Reference Temperature

Coefficient

REF

60 ppm/°C

Load Regulation 1.25 mV/mA

BUFFERED EXTERNAL REFERENCE (V

REFIN

=+2.048V)

REFIN Input Voltage V

REFIN

2.048 V

Positive Reference Output

Voltage

REFP

2.012 V

Negative Reference Output

Voltage

REFN

0.988 V

Differential Reference Output

Voltage Range

∆V

REF

∆V

REF

= V

REFP

- V

REFN

0.98 1.024 1.07 V

REFIN Resistance R

REFIN

>50 MΩ

Maximum REFP, COM Source

Current

SOURCE

>5 mA

Maximum REFP, COM Sink

Current

SINK

250 µA

Maximum REFN Source Current I

SOURCE

250 µA

Maximum REFN Sink Current I

SINK

>5 mA

UNBUFFERED EXTERNAL REFERENCE (V

REFIN

= AGND, reference voltage applied to REFP, REFN and COM )

REFP, REFN Input Resistance

REFP

REFN

Measured between REFP and COM and

REFN and COM

4kΩ

1 2 3 4 5 6 7 8 ... 18 19

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